Locking device



FIG. 1 is a top, right side perspective view of a locking device showingmy new design;

FIG. 2 is a top, left side perspective view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a back view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines depict portions of the article that form no part of theclaimed design.

CLAIM The ornamental design for a locking device, as shown and described. 